US1887548A

US1887548A - Hoist

Info

Publication number: US1887548A
Application number: US568701A
Authority: US
Inventors: Dartsup Fredrick
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-10-14
Filing date: 1931-10-14
Publication date: 1932-11-15
Anticipated expiration: 1949-11-15

Description

-N 15,1932. F, ARTSU 1,887,548

HOIST 7 Filed Oct. 14, 1951 2 Sheets-Sheet 1 lA/VfiNTo/Q FRED/FICA D142 raup Arrow/5x.

F. DARTSUP Nov. 15, 1932.

HOIST Filed Oct; 14, .1931

2 Sheets-Sheet I 2 Patented Nov. 15, 1932 UNITED STATES rannmcx nausea or NEW oann uvs, noursmira HOIST Application 1115a October 14, 1931. Serial No. 568,701.

The object of my invention is to make a portable hoist, to be used in building construction work for the hoisting of concrete that is to be poured. In work of this kind,

it is customary to elevate concrete at a centralpoint and have it gravitationally flow through pipes to the point at which it is to be used.

The erection of the present hoist is an expensive operation. The material out of which the hoist is made is itself expensive. The removal of the hoist after the operation is completed is almost as expensive as its erection. The purpose of my invention is .to so make a hoist of the type described that it may be easily transported to and from a Job, and that it may be set up at practically no expense in a few minutes.

A further object is to provide means for elevating sections of the hoist from the bottom of the hoist. My invention also provides a bucket'for the transporting of the concrete from the bottom of the hoist to the to of the hoist.

y invention. may be made of few and simple parts that lend themselves readily to multiple production, may be easily and cheaply made of conventional structure. Furthermore, a portion of the means for elevating a section of the hoist from the bottom may be used as a supporting means for the upper section, after the upper section is in position. The elevating of the upper section of the hoist and of the concrete bucket may be accomplished either manually or mechanically.

With these and other objects in view, .my invention has relation to certain novel features of construction and arrangement J of parts as will be hereinafter more fully described, pointed out in the claims and illustrated in the drawings, in which Fi 1 is a side. elevationof my device showing the hoist in position for being transported. Fig. 2 is a similar view of my device,

showing the hoist in its vertical erected position. N I

Fi 3 is a rear elevation of my device showing tie-hoist in its extended position, and

Fig. 4 is a view similar to Fig. 3 showing tact with the vertical frame element 9. This the hoist with its extension in its lowered Position. Fig. 5 is a sectional plan view on. the line 55 of Fig. 3-.

Numeral 6 designates a truck having the frame 7 and the tractionwheels 8. Numeral 9 designates a vertical frame element secured to one end of the frame 7 and supported by the support 10., Numeral llfldesignates the hoist generally, which is formed of two tubes 12, which are secured together in spaced relationship by the supports 13. The hoist 11 is hingedly secured to the truck .6 atthe end opposite the vertical frame element 9, as follows: e 1

To each tube 12 near its lower end is secured a hinge 14. Each hinge is secured to 1 one end'of the elements of frame 7. The

hinges 14 are secured to the tubes 12 at a distance equal to the distance of thehinges 14 from the surface on which thewheels 8 are supported. In other words, whenthe hoist 11 is positioned vertically, the lower ends of the tubes 12 will come in contact with'the ground or supporting surface of the truck 6, 7' and thereby aid in supporting the'hoist 11 when in its vertical position. The hoist 11 is of such length that when moved in an anticlockwise direction'to the position shown in Fig. 1, the upper outer end will come in con- 3 is the position of the hoist when it is in the collapsed transporting position. The'truck 6 will usually be used as a trailer for a truck or tractor.- On the truck 6 may also be positioned'a concrete mixer and an engine for operating it. In sliding engagement in the tubes 12 are positioned the tubes 15. The tubes 15 are secured together attheir upper free ends by means of the top brace 16. N u- 1 merals 17 designate additional braces for securing the top brace 16 to the tubes 15. 'Numeral 18 designates a brace secured to the tubes 15 for holding the tubes 15in correct spaced relationship. The tubes 15, together as with the top brace 16,

braces

17 and 18 form the extensible portion 19 of the hoist. It will be seen that by the structure thus far described that the'extensible portion of the hoist may be raised and lowered'in the tubes 12.

The means of raising and lowering the extensible portion 19 from the bottom of the hoist, are the following:

Numerals 20 designate elevating rods, which are secured to the tubes 15 at their upper ends in any conventional manner, as shown in Figs. 3. and i hingedly. Numeral 21 designates a U bolt passing through holes in the lower ends of the elevating rods. 20, securing the elevating rods in the position shown in Fig. 4, when the extensible portion 19 is in its lowered position. It will be seen that when the U bolt 21 is elevated that the extensible portion 19 will be elevated. The means for elevating the U bolt 21, together with the extensiblexportion 19, are the following:

Numeral 22 designates a pulley, secured operatively in the top support 13 near the center thereof. Numeral 23 designates a pullley, secured to the support 13 laterally beyond one of: the tubes 15. Numeral 2 1 designates a cable secured at one end to the U bolt 21 and'passing over. the

pulleys

22 and 23 and then downwardly tothe drum 25, around which it is. wrapped. hen the extensible portion 19 is in the position shown in Fig. 4:, the cable 24 is taut. .The. drum 25 is mounted on a shaft 26, which is rotatively seemed at any convenient point, either between the tubes 12 or on. the truck 6.

. It will be. seen that when the. drum 25 is rotated so as to wrapthe cable 24 around it, that the U. bolt21 will be. pulled upwardly, thereby pushing the extensible portion 19 upwardly to. its extended position. The tubes 15. are. of suflicient length relative the tubes 12 that the extensible portion 19 may be elevated the full length ofthe tubes 12. Pins are secured in holes passing throughtubes 12 and 15: holding them. together when tubes 15 are extended.

lYhen the extensible portion 19 has been elevated to. the position indicated in Fig. 3, the U. bolt 21 isremoved from. the elevating rods 20 and the elevating rods 20 are used as av support for the extensible portion. 19 on thelower portion of the. hoist in the following manner:

The elevating rod 20 on the right is moved from the position shown in Fig. i to that shown in Fig. 3. The elevating rod 20 on the left is moved from the position shown in 4 to that shown in Fig. 3. By this means the elevating rods 20 cross each other.

Numerals 27 designate bolts, which pass through the holes in the lower ends of the elevating rods, through which the U bolt 21 passed, and through holes in the upper end of the tubes 12. I

Itwill be seen that by this means that the elevating rods 20 form very strong supporting braces for the extensible portion 19. lglates 28 extend along the entire tube 15 when it is in its raised position so as to crease its diameter to that of the tube 12.

In order to make the entire hoist more rigid guy cables 29 are secured to the top brace 16 at each side, the other ends being secured to stakes in the ground at some convenient point. Guy cables 30 secured to the uppermost support 13 at one end andtostakes properly positioned in the ground at the other, likewise add rigidity to the lower portion of the hoist.

. Numeral 31 designates a bucket for elevating the concrete.

Numeral 32 designates a bucket pulley secured to the top brace 16 of the extensible portion 19. iNumeral' 33 designates a cable to: which the. bucket 31 is secured. The cable 33passes over the bucket pulleys 32 and 32. and downwardly to a drum 34:. The cable-33 is wrapped around the drum 341sothat when the drum 3:4. is'rotated in the. proper. direc-. tion, the. cable 33 will be wrapped around it and the bucket 31 elevated to the top of the extensible portion 19. Then the. bucket-31 reaches its upper position, a plate on the bucket is trippedand the. contents of the bucket discharged into the desired concrete pipe. Applicant does. not claim any particular novelty in the. bucket 31 or in the tripping means. This is conventional-structure. In order to facilitate the movement up and. downof the. bucket 31, wheels or rollers. 35 are operatively secured to the bucket 3 1, so that they may roll on the tubes 1 2 -and 15. Additional braces. for the tubes 12 and frame 7: may be provided, such as36 and 37 For operating the

drums

25 and 34, manual means have been shown, such as the handles 38. Separate drums for the cable24 and for the cable eama be provided, orthey may be joined together or both drums may be mount. ed. on al single shaft. Likewise the drums may be. of varying diameter. In operation preferably, the drums are-rotated! mechanically rather thanmanually, that is the drums may be secured. to. a rotational shaft 0t an engine, such as is. used on the tractor for transporting the hoist.

In Fig. 4, the. bucket 31 is shown in. its

lowest position and Fig. 3*.isshown in anintermediate position. The samepulleys may be used ordifferentpulleys. for elevating the extensibleportion- 19. and-the bucket 31'. Inasmuch as, the plates. 28 cover the break be: tween; the lower portion of; the hoist and the extensible portion .19, when. the. hoist isin the position shown inFig; 3, the bucket 31 may be'easily rolled from the tubes 12 to thetubes 15. Y

It is to beunderstoodi that when the. extensible portion 19.is to. be lowered" that. the process is the reverse of that employedin raising the extensible portion 19:; that: is. in

28 must first be. removed, the pins removed the elevating rods must be moved from the position shown in Fig. 3 to that in Fig. 4 se cured to the U bolt 21 and the drum 25 ro-- tated in a direction opposite to that employed when the extensible portion 19 was elevated.- Likewise in lowerin the bucket 31, the drum 34 must be rotated in such a direction as to unwind the cable 33.

What I claim is: 1. A hoist comprising stationary tubes and movable tubes, said movable tubes telescopic in said stationary tubes, the stationary tubes secured together by braces and the movable tubes secured together by braces, elevating rods secured to said movable tubes hingedly, a U bolt, the lower free ends of said elevating rods being secured in spaced relationship in said U bolt, to which is secured a cable, a top support securing said stationary tubes together, pulleys operatively positioned on said top support, said cable passing over said pulleys, a drum secured to said stationary tubes, said cable passing over said drum, and means for securing the free ends of said elevating rods to said stationary tubes when said movable tubes are in their extended position, plates selectively positioned over the jointure between said stationary and mov able tubes.

2. A hoist comprising stationary tubes and movable tubes, said movable tubes telescopic in said stationary tubes, elevating rods secured to said movable tubes hingedly, a bolt, the lower free ends of said elevating rods being secured in spaced relationship in said bolt, to which is secured a cable, a top support securing said stationary tubes together, pulleys operatively positioned on said top support, said cable passing over said pulleys,

a drum secured to said stationary tubes, said cable passing over said drum and means for securing the free ends of said elevating rods to said stationary tubes, when said movable tubes are in their extended position. i

3. A hoist comprising stationary tubes and movable tubes, said movable tubes telescopic in said stationary tubes, the stationary tubes secured together by braces and the movable tubes secured together by braces, elevating rods secured to said movable tubes hingedly, a bolt, the lower free ends of said elevating rods being secured in spaced relationship in. said bolt, to which is secured a cable, a top support securing said stationary tubes together, pulleys operatively positioned on said top support, said cable passing over said pulleys, a drum secured to said stationary tubes, said cable passing over said drum and means for securing the free ends of said elevating rods to said stationary tubes, when said movable tubes are in their extended position. In testimony whereof I afiix my signature.

FREDRICK DARTSUP.